"map lichen" meaning in English

{
  "forms": [
    {
      "form": "map lichens",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "map lichen (plural map lichens)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Lichens",
          "orig": "en:Lichens",
          "parents": [
            "Algae",
            "Fungi",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
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          "source": "w"
        }
      ],
      "glosses": [
        "Rhizocarpon geographicum, a lichen that grows in patches on rocks in mountainous areas, giving the appearance of a map."
      ],
      "id": "en-map_lichen-en-noun-QgQzIlD1",
      "links": [
        [
          "lichen",
          "lichen"
        ],
        [
          "patch",
          "patch"
        ],
        [
          "rock",
          "rock"
        ],
        [
          "mountainous",
          "mountainous"
        ]
      ],
      "wikipedia": [
        "map lichen"
      ]
    }
  ],
  "word": "map lichen"
}

{
  "forms": [
    {
      "form": "map lichens",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "map lichen (plural map lichens)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "Entries using missing taxonomic name (species)",
        "en:Lichens"
      ],
      "glosses": [
        "Rhizocarpon geographicum, a lichen that grows in patches on rocks in mountainous areas, giving the appearance of a map."
      ],
      "links": [
        [
          "lichen",
          "lichen"
        ],
        [
          "patch",
          "patch"
        ],
        [
          "rock",
          "rock"
        ],
        [
          "mountainous",
          "mountainous"
        ]
      ],
      "wikipedia": [
        "map lichen"
      ]
    }
  ],
  "word": "map lichen"
}